Rotary valve.



P; L. TENNBY. ROTARY VALVE. APPLIOATIOIFI FII AED AUG. 24, 1910. v

. Patented June a, 1911.

' 2 SHEETS-3153! 1.

P. L. TENNEY.

ROTARY VALVE.

Patented June 6, 1911.

NITED sTA'rn PATENT OFFICE.

PERRY I1. TENNEY. 0F ALAMEDA. CALIFORNIA, ABSIGNOB OF ONE-HALF TO WILL!M. LATHAM, OF ALAKEDA, CALIFORNIA.

ROTARY VALVE.

Specification at Lettenhtent.

Patented June a, 1 a'l-a.

A plication fled August 24. 181p. Berta! Io. 57!,781.

State of California, have. invented new and' useful Improvements inRotary Valves, of which the following is a specification.

This invention pertains to valves, and particularly pertains to rotaryvalves for gas engines.

The object of the invention is to provide a durable, etficient andpractical rotary valve for internal combustion engines, and es )0-ciully to provide a valve structure embot ying features of. the designand arrangement whereby the freezing. of the valve is postlivelyprevented.

The invention consists of the parts and the construction and combinationof parts as hereinafter more fully described and claimed, havingreference to the accompanying drawings, in Wlllcli-- Figure 1 is a sideelevation of the engine with the valve applied. Fig. 2 is a longitudinalsection through the vulve and its seat. Fig. 3 is a section on line A-Aof Fig. 2 of the valve. Figs. 4 and 5 are sections showing the eccentricrelation of the ring seat, valve and the valve seat. Fig. 6- is asection on line C D Fig. 2. Fig. 7 is a section on line E--E of Fig. 2showing the con ling.

hlilch dilliculty has heretofore been encountered in making an internalcombustion engine with rotary valv s so'thut the alves will mt bind byexpansion and contrn:.i0n due. to the extremes of heat and cold. I havebuilt. and successfully operated an em 'gine of this class involving avalve designed to revolve continuously in one directionrand which willnot bind in its seat under pressure, or become "jammed by ex mnsion dueto heat. or in other words, it will not freeze.

The illustrations show one form of my invention in which a valve 2, ismounted horizontally at, "or near one end of the engine cylinder 3, in'llltlt reciprocate-s a piston 4 connected by a pitman rod 5 to the.usual crank whereby the engine shaft 7 is driven. Secured In the engineshaft 7 is a gear i by which power i HnHFmHllti through suitabl(Hllllt'fhl lll' aw "lvu n l l neeted to the gilt-i- J. The ratiosexisting l between the gears 8 and 10 is, in this it.- stanee, four toone and the valve is shown in the closed position, and the piston at therearmost. end of its stroke at the instant of an explosion in the casingof the engine. The valve 2, Figs. 23, is shown as havm'ga port 11, whichin its cycle successively opens an exhaust port 12 in the casing of theen gine and thence passes and communicates with an inlet port, 13,through which a .ehurgc of gas is drawn into the engine as the Jiston 4moves outwardly in the casing.

1e important features involved in my invention is in the peculiarconstruction of the valve and of its seats in the casing whereby thevalve is properly seated so as to turn easily and is also prevented frombeing jammed or pinched by its expansion within its seat in the casing,and the means for holding the valve section.. 'To this end the enginecasing is first bored to a diameter represented by the narrow annularledges 15, Fig. 2, which ledges later, as will be seen, form a series ofseats 15 in the casing for the snap-rings 16. The center of this firstbore is Fig. 4 and its radius A B. The valve 2 is of slightly lessradius thanA B.

In order toseat the valve properly and prevent it, when expanded. frombinding in its bearings; the casing 2 is bored or otherwise formed. asby grinding, using a grinding tool of the shape and size of the actualvalve to be used: and by employing emery the valve seat is. ground downor dished until the valve seat is worn an amount represenhalapproximately by l) h Fig. 4. This grinding provides a semi-cylindricalseat 17, eccentric to the ring seats 15. but of a diameter equal to thediameter of the body or cylindrical portion of the valve 2. The centerof the valve is represented by C Fig. 4 and its radius is equal to C Dor C F.

Preferably, the center (3. Fig. 4, upon which the seat, 17 for the valve2 is formed in the engine. is lower than the center A; upon which thepacking ring seats 15 are forum-d. The two horns or seats 15 and t! areeccentric: to one another; the two bores,

lit"

ried by the valve and seating on said led es, a valve stem, and auniversal connection etween the valve stem and the valve.

5. The combination of a rotary valve and its seat, the seat formed bytwointerseeting bores, the valve resting in one here, inwardlyprojecting ledges in the seat concentrio with the other bore, snap-ringscarried by the valve and seating on said ledges, and

a valve stem llavin a notched head fitting a gimbal ring, said end ofthe valve.

G. The combination of avalve casing and a rotary valve havin e atransversely elongated valve seat-, said valve carrying spacedsnap-rings fitting up-raised annular ledges on the valve seat. theportion of the valved casing opposite the point of contact of the valvewith its seat havin v one or more pockets in which are houseilbearingshoes to maintainthe valve closely seated,

7-. The combination of a valve casing and gimb'alring fitting an arotary valve having a transversely eloni gated valve seat, said valvecarrying snaprings at its end s.fitting lip-raised annular ledges on thevalve seat, the portion of the valved easing 0 posite the point ofcontact of the valve wit 1 its seat havin one. or more pockets in whichare housed caring shoes to maintain the valve closely seated, andsprings within the pockets acting on said bearing shoes to press themagainst the valve.

8. The combination of a rotary valve and its seat, the seat formed bytwo intersecting bores, the valve resting in one bore in- \vardlyprojecting ledges in the seat concentric with the other bore, snapringsmounted in the valve and seating on said ledges, and means for supplyingoil between each pair of snapa'ings. I

vIn testimony whereof I have hereunto set my hand in the presence, oftwo subscribing witnesses.

PERRY L. TENNEY. Witnesses Flmonawu E. M YNARD, Gmmnns EDELMAN.

